一、问题的提出当前自动化在各行各业都已普遍推广实行,冶金轧钢、材料试验、轻工轻纺,食品传送等都提出对低转速需要实行较精确的测量,以便自动控制顺利进行以及取得可靠的试验数据。机械转速计量仪表是无法完成达一使命的。而电子测速仪表,一般又以非接触式的为发展方向。因为它不干涉被测转体,对机壳内部的局部转体,只要能够看见,在可测的距离之内就很容易取得完满的测量结果。因此,生产实践向我们提出,必须设计制造非接触式的高精度、低转速快速测量仪器仪表。 First, the issue raised At present, automation has been widely practiced in all walks of life, metallurgical steel rolling, materials testing, light industry, textile, food delivery and so on are required to implement a more accurate measurement of low speed in order to facilitate the smooth progress of control and access Reliable test data. Mechanical speed measuring instrument is unable to accomplish a mission. The electronic speed meter, generally non-contact for the development. Because it does not interfere with the measured rotors, the local swivels on the inside of the housing, as long as they can be seen, make it easy to obtain a perfect measurement within the measurable distance. Therefore, the production practice to us, we must design and manufacture of non-contact high-precision, low-speed rapid measurement instrumentation.